<template>
    <div>
        <!-- 导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>
            <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
            <!-- 步骤条 -->
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <el-form
                ref="addFormRef"
                :rules="addFormRules"
                :model="addForm"
                label-width="80px"
                :label-position="'top'"
            >
                <el-tabs
                    :tab-position="'left'"
                    v-model="activeIndex"
                    :before-leave="beforeTabLeave"
                    @tab-click="tabClicked"
                >
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader
                                v-model="addForm.goods_cat"
                                :options="cateList"
                                :props="cateProps"
                                @change="handleChange"
                                clearable
                            ></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <el-form-item
                            :label="item.attr_name"
                            v-for="item in dongtaiParams"
                            :key="item.attr_id"
                        >
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox
                                    :label="val"
                                    v-for="(val,i) in item.attr_vals"
                                    :key="i"
                                ></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item
                            :label="item.attr_name"
                            v-for="item in jingtiaParams"
                            :key="item.attr_id"
                        >
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-upload
                            class="upload-demo"
                            :action="uploadURL"
                            :on-preview="handlePreview"
                            :on-remove="handleRemove"
                            :on-success="handleSuccess"
                            list-type="picture"
                            :headers="headerObj"
                        >
                            <el-button size="small" type="primary">点击上传</el-button>
                            <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                       <!-- 富文本编辑器 -->
                       <el-row>
                          <el-col>
                             <quill-editor v-model="addForm.goods_introduce" class="ql-editor"></quill-editor>
                          </el-col>
                       </el-row>
                       
                       <el-button type="primary" @click="addGoods" class="btnAdd">提 交</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
        <!-- 预览上传的图片 -->
        <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
            <img :src="previewPath" alt  class="preview-img"/>
        </el-dialog>
    </div>
</template>

<script>
//引入lodash,主要用于深拷贝
import _ from 'lodash'
export default {
    data() {
        return {
            addForm: {
                goods_name: '',
                goods_cat: [],
                goods_price: 0,
                goods_number: 0,
                goods_weight: 0,
                //上传图片数组
                pics: [],
                goods_introduce:'',
               //  商品参数动态，静态
               attrs:[]
            },
            addFormRules: {
                goods_name: [
                    {
                        required: true,
                        message: '请输入商品名称',
                        trigger: 'blur'
                    }
                ],
                goods_price: [
                    {
                        required: true,
                        message: '请输入商品价格',
                        trigger: 'blur'
                    }
                ],
                goods_weight: [
                    {
                        required: true,
                        message: '请输入商品重量',
                        trigger: 'blur'
                    }
                ],
                goods_number: [
                    {
                        required: true,
                        message: '请输入商品数量',
                        trigger: 'blur'
                    }
                ],
                goods_cat: [
                    {
                        required: true,
                        message: '请选择商品分类',
                        trigger: 'blur'
                    }
                ],
                goods_price: [
                    {
                        required: true,
                        message: '请输入商品价格',
                        trigger: 'blur'
                    }
                ]
            },
            cateList: [],
            cateProps: {
                value: 'cat_id',
                label: 'cat_name',
                children: 'children',
                expandTrigger: 'hover'
            },
            activeIndex: '0',
            dongtaiParams: [],
            jingtiaParams: [],
            uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
            //由于设置了axios拦截器，upload的请求头是他自己的，所以要添加我们需要的token信息
            headerObj: {
                Authorization: window.sessionStorage.getItem('token')
            },
            previewPath: '',
            previewVisible: false
        }
    },
    created() {
        this.getCateList()
    },
    methods: {
        handleChange() {
            if (this.addForm.goods_cat.length !== 3) {
                //return this.$message.error('请选择三级分类')
                this.addForm.goods_cat = []
                return
            }
        },
        async getCateList() {
            const { data: res } = await this.$http.get('categories')

            if (res.meta.status !== 200) {
                return this.$message.error('获取商品分类数据失败')
            }
            this.cateList = res.data
        },
        //   tabs栏切换之前触发
        beforeTabLeave(activeName, oldActiveName) {
            if (oldActiveName === '0') {
                if (this.addForm.goods_cat.length !== 3) {
                    this.$message.error('请选择商品的分类')
                    return false
                } else if (this.addForm.goods_name.trim().length === 0) {
                    this.$message.error('请输入商品名称')
                    return false
                } else if (
                    this.addForm.goods_price.length === 0 ||
                    this.addForm.goods_price === 0
                ) {
                    this.$message.error('请输入商品价格')
                    return false
                } else if (
                    this.addForm.goods_weight.length === 0 ||
                    this.addForm.goods_weight === 0
                ) {
                    this.$message.error('请输入商品重量')
                    return false
                } else if (
                    this.addForm.goods_number.length === 0 ||
                    this.addForm.goods_number === 0
                ) {
                    this.$message.error('请输入商品数量')
                    return false
                }
            }
        },
        async tabClicked() {
            if (this.activeIndex === '1') {
                const { data: res } = await this.$http.get(
                    `categories/${this.cateId}/attributes`,
                    {
                        params: { sel: 'many' }
                    }
                )
                if (res.meta.status !== 200) {
                    return this.$message.error('获取动态参数列表失败！')
                }
                res.data.forEach((item) => {
                    item.attr_vals =
                        item.attr_vals.length === 0
                            ? []
                            : item.attr_vals.split(' ')
                })
                this.dongtaiParams = res.data
            } else if (this.activeIndex === '2') {
                const { data: res } = await this.$http.get(
                    `categories/${this.cateId}/attributes`,
                    {
                        params: { sel: 'only' }
                    }
                )

                if (res.meta.status !== 200) {
                    return this.$message.error('获取静态属性失败！')
                }
                this.jingtiaParams = res.data
            }
        },
        //   图片预览
        handlePreview(file) {
            this.previewPath = file.response.data.url
            this.previewVisible = true
        },
        //上传图片成功
        handleSuccess(file) {
            this.addForm.pics.push({ pic: file.data.tmp_path })
            //console.log(this.addForm)
        },
        //删除上传图片
        handleRemove(file) {
            const filePath = file.response.data.tmp_path
            const index = this.addForm.pics.findIndex((item) => {
                item.pic === filePath
            })
            this.addForm.pics.splice(index, 1)
        },
        addGoods(){
           this.$refs.addFormRef.validate(async valid=>{
              if(!valid){
                 return this.$message.error("请填写必要的表单项!")
              }
              //对addform进行深拷贝，因为goodcat和级联选择器已经关联，所以不能直接修改它的值
              const copyForm=_.cloneDeep(this.addForm)
              //将数组转换为字符串
              copyForm.goods_cat=copyForm.goods_cat.join(',')
              //格式化动态参数，加到attrs数组中
              this.dongtaiParams.forEach(item=>{
                 copyForm.attrs.push({attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')})
              })
              //静态属性，因为没在获取数据的时候转换为数组，所以不用转换，直接赋值
              this.jingtiaParams.forEach(item=>{
                 copyForm.attrs.push({attr_id:item.attr_id,attr_value:item.attr_vals})
              })
              console.log(copyForm)
              const{data:res}=await this.$http.post('goods',copyForm)
              if(res.meta.status!==201){
                 return this.$message.error('商品添加失败')
              }
              this.$message.success('商品添加成功')
              this.$router.push('/goods')
           })
        }
    },
    computed: {
        cateId() {
            if (this.addForm.goods_cat.length === 3) {
                return this.addForm.goods_cat[this.addForm.goods_cat.length - 1]
            }
            return null
        }
    }
}
</script>

<style lang='less' scoped>
.el-tabs {
    margin-top: 15px;
}
.el-steps {
    margin: 15px 0;
    justify-content: center;
}
.el-step__title {
    // ///////////////////////////////bug，改不过来
    font-size: 13px !important;
}
.preview-img{
   width: 100%;
}
.btnAdd{
   margin-top: 10px;
}
.ql-editor{
   height: 380px !important;
   padding-top: 0;
   padding-left: 0;
}

</style>